Heater for hot-air engines



July 24, 1928., 1,678,396 .J. KOENIG v HEATER FOR'HOT AIR ENGINES Filed Marc! 1'7, 1926 642W G' ZO JUEE/UZY 2527527175 /Zym7/ j fi U N I TED "STAT ES 7 Patented July 24, 1928 1 1,678,396 PATENT; OFF-ICE.

'irosnrngxonme, on MAivrrowoo," WISCONSIN.

HEATER FOR HOT-AIR ENGINES, I

Application filed March 17, 1926. Serial No. 95,357.

Further objects are to provide a heater which will conservethe heat and permit the maximum extraction of heat from the hot gases, which will dilute the intensely hot gases with the products of combustion held within the chamber, and which will rapidly i circulate the products of combustion so that an I intimate commingling of the intensely heated gases with the gases of a lower temperature is assured.

An embodiment of the invention is shown in the accompanying drawings, in which:

Figure 1 is a sectional view through the heater showing it in place upon a hot an engine with parts of the engines cyllnders in section.

Figure 2 is an enlarged sectional view through the burner.

Referring to the drawings, it will be seen that a pair of cylinders 1 and 2 are indicated, each provided with a plurality of pipes 8. These pipes and the upper ends of the cylinders are heated in hot air engines of the type referred to.

I An inner casing 4: surrounds the upper ends of the cylinders and is itself surrounded by an intermediate casing 5. An outer casing. 6 completely surrounds the intermed1ate casing. Thus, an inner space 7 between the inner and intermediate casings, and an outer space 8 between the intermediate and outer casings is provided. The space 7 communlcates freely with the interior of the inner casing 4 by means of the passageways 9. However, the intermediate casing is tightly sealed' against the cylinders. Thus, the products of combustion from the space within the inner casingt passes between the casings 4c and 5 and outwardly through the vent pipe 10. Fresh air enters the space 8 between the intermediate and outer casings by way of the apertures or passageways 11. This fresh air is, therefore, highly heated by contacting with the hot casing 5. It passes downwardly through a pipe 12 to the burner 13.

This burner 13 is more fully illustrated in Figure 2. It be seen from this' figure that'th'e burner consists'of an outer casinglat and an inner casing15. The heated air passes through the pipe 12 to the inner casing and mixes with the fuel supplied by means of the nozzle or pipe 16 from any suitable source, such fuel maybe gas, oil or other material suitable forthis kind ofburner.

Ithis to be noted thatan auxiliary pipe 17 communicates with the space between the casingsor shells 14 and 15 of theburner 13.

This pipe 17 as may be seen from Figure 1, issupplied-by means of a fan orblower. 18. The intake pipe of the blower is indicated at 19 and communicates with the space in;

side of the innermost casing 4. Thus the heated products-of combustion aresucked into the blower and forced through the pipe 17 to the burner. This flow of gases, therefore, dilutes the intensely heated gases from the burner and passes outwardly from the burner in the form of an enveloping shell surrounding the highly heated gases.

In addition to this effect, the blower maintains a rapid circulation of gases through the device and insures intimate commingling of the products of combustion with the intensely heated gases.

This type of burner, therefore, will be found highly efiicient in the conservation of heat, and will permit the extraction of a large amount of heat by the tubes 3 and the ends of the cylinders 1 and 2 of the hot air engine. Further, the rapid circulation of gases maintained by means of the blower and burner associated, as described, aids in the extraction of heat,

It will be seen that a very efiicient heater for hot air engines has been provided by this invention, and it will be, seen further that the construction described in detail above. provides a heated space for the hot end of the air cylinders, in which a rapid circulation is maintaine It will be seen further that the air is preheated and passed to the burner so that heat it not lost by continuation through the intermediate casing, but that this heat is brought back into the space within the in-- I aim 1. In a heater for hot air engines, the combination of a pair of air cylinders have ing hot ends, an inner casing surrounding the hot ends of the cylinders, an intermediate casing surrounding the inner casing and providing a space therebetween, said inner casing communicating freely with the said space, a vent pipe leading outwardly from theintermediate casing, an outer cas: ing surrounding the intermediate casing and hayingaper-tures tor the entrance of air, and a; burner opening into the space within the inner casing and. havingani air pipe comm-unicating with the space between the outer casing and the intermediate casing, whereby the interior of the inner casing is the hot-.. test, the space between the inner and intermediate casing, the: next hottest, and the space between the outer and intermediate casing, the coolest.

2-1111 aid'evice of the class described, the combination of an air conditioning cylinder having hot: tubes at: one end, an inner case ing surrounding: such hot tubes, an intermediate casing surrounding the inner case. ins-gr and spaced therefrom, said; inner casing communicating freely with the space be;

tween such casing and theintermediate case ing, a, ventpipe opening outwardly from th intermediate casing, outer casing surrounding saidi intermediate casing and having air entrance apertures therein, a burner supplied with preheated air by means of a pipe" opening through the intermediate casing into, the space between the intermediate and outercasing having a blower adapted toisuck the; products of combustion from the intermediate casing and return them in proximity to the burner, whereby a rapid irculation of the products of combustion is assured.

3:. In a. device of the class described, the combination of an, aircylinder for a hot, air enginehaving a; heated end, a casing: S131 rounding sucliheated end, a burner com: municating with the interior" of saidcasing, means for preheating the air and supplying it to. said burner-, meanstfon conducting-prodnets of combustion outwardlyfrom such casing, and a blower communicating: with the casing and with the burner for forcing the products of combustion past: suchburner and; into the casing. V r a In testimony that I claim the foregoing I have hereunto set my hand at, Manitotwoc, in the county ofManitowoc. and State of: Wiscousin.

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